I need your help.

Last night, I installed a Hella battery disconnect switch (2 terminals) on my car. The switch has cables already attached. Since the battery is mounted in my trunk, someone suggested that I connect it to the negative side of the battery so the switch isn't hot when turned off.

One cable has a terminal clamp that I connected to the negative battery post and the other cable has a cone shaped fitting that attaches to the original battery cable. The switch works fine. However, I have a problem. My voltage meter is now screwed up. It pegs to the right and stays there when the car is running.

What did I do wrong?

Help!!!

Thank You in Advance

Pat